diff --git a/post_cache_action.sh b/post_cache_action.sh
index 8440aa3..144fe76 100755
--- a/post_cache_action.sh
+++ b/post_cache_action.sh
@@ -3,6 +3,10 @@
 # Fail on any error.
 set -e
 
+# Include library.
+script_dir="$(dirname -- "$(realpath -- "${0}")")"
+source "${script_dir}/lib.sh"
+
 # Directory that holds the cached packages.
 cache_dir="${1}"
 
diff --git a/restore_pkgs.sh b/restore_pkgs.sh
index 647a2aa..d056630 100755
--- a/restore_pkgs.sh
+++ b/restore_pkgs.sh
@@ -3,6 +3,10 @@
 # Fail on any error.
 set -e
 
+# Include library.
+script_dir="$(dirname -- "$(realpath -- "${0}")")"
+source "${script_dir}/lib.sh"
+
 # Directory that holds the cached packages.
 cache_dir="${1}"